﻿using System;
/*
    Write a program that reads the radius r of a circle and prints its perimeter and area 
    formatted with 2 digits after the decimal point.
 */

class CirclePerimeterAndArea
{
    static void Main()
    {
        double perimeter;
        double radius;
        double area;

        Console.Write("Enter nymbers for radius: ");
        radius = double.Parse(Console.ReadLine());

        perimeter = 2 * Math.PI * radius;
        area = Math.PI * (radius * radius);

        Console.WriteLine("Perimeter is: {0:F2}", perimeter);
        Console.WriteLine("Arena is: {0:F2}", area);
    }
}